Self Propelled Trolley & Motorized Trolley, the most robust of the market. Capacity 30 to 200 Tons with 360º turns, electric or batteries The self powered trolleys consist motor driven trolley and front rotating traction car (ST-TBC) of reduced dimensions (given the great capacity they have) and a pair of fixed rear trolleys (CT), that perform a function similar to that of the rear axle of a